split utils

utils/polyfills.js

@@ -0,0 +1,16 @@
+"use strict";
+
+// replaceAll
+if (String.prototype.replaceAll === undefined) {
+  String.prototype.replaceAll = function (str, newStr) {
+    if (Object.prototype.toString.call(str).toLowerCase() === "[object regexp]") return this.replace(str, newStr);
+    return this.replace(new RegExp(str, "g"), newStr);
+  };
+}
+
+// flat
+if (Array.prototype.flat === undefined) {
+  Array.prototype.flat = function () {
+    return this.reduce((acc, val) => (Array.isArray(val) ? acc.concat(val.flat()) : acc.concat(val)), []);
+  };
+}